Thank you for viewing. This item was distributed at the 2025 Yukuhashi-Beppu 100km walk. It was attached to a backpack. The pin part came off early on (around 20km). I carelessly put it in my backpack and went home. It came off. I glued the pin part back on. It's clean as you can see in the pictures, but there are some minor scratches. The pin wire is also slightly bent. I hope it reaches someone who doesn't mind these imperfections. Simple and basic packaging, using recycled materials. ↓Automatic description by AI YB100 model device for 100km walk, with ON/OFF switch. - Model Name: YB100 - Function: For 100km walk - Switch: ON/OFF switch Please feel free to ask if you have any questions.